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Wheel offset calculator courtesy of BimmerPost.com. You may use this calculator to calculate what tire sizes you might need if you upgrade your tires, or what wheel sizes/offsets are compatible with your car.

	TIRE WIDTH	/	ASPECT RATIO	- WHEEL DIAMETER
ORIGINAL TIRES		/
NEW TIRES		/

Based on your stock wheel setup, your new wheel will have:

Original Tires Diameter (in.)
New Tires Diameter (in.)

Difference in diameter (in.)
Percent Difference %

Speedo @60mph will read: mph

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02-06-2007, 10:44 AM	#1
vox Enlisted Member Drives: E90D Join Date: May 2006 Location: Porto Posts: 43 iTrader: (0)	Suspension/RFT Hello! I have a E90 SportPack European, 225/45R17RFT, 255/40R17RFT. I´m have to change tires and i´m thinking on changing the wheels to, 19! In that case 225/35R19 NON-RFT and 255/30R19NON-Rft. My question is, in your opinion what´s my best choice 19 with that sizes or 18 still non-rft? Is the car going to be more stiff or soft with this setup? Compared with stock 17RFT? Any ideas? What i´m hamming for is better grip, better looks, without loosing much suspension(softness). Best TKx Vox
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